<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Translate
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @version    $Id: Qt.php 16971 2009-07-22 18:05:45Z mikaelkael $
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */


/** Zend_Locale */
require_once 'Zend/Locale.php';

/** Zend_Translate_Adapter */
require_once 'Zend/Translate/Adapter.php';


/**
 * @category   Zend
 * @package    Zend_Translate
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Translate_Adapter_Qt extends Zend_Translate_Adapter {
	// Internal variables
	private $_file        = false;
	private $_cleared     = array();
	private $_transunit   = null;
	private $_source      = null;
	private $_target      = null;
	private $_scontent    = null;
	private $_tcontent    = null;
	private $_stag        = false;
	private $_ttag        = true;
	private $_data        = array();

	/**
	 * Generates the Qt adapter
	 * This adapter reads with php's xml_parser
	 *
	 * @param  string              $data     Translation data
	 * @param  string|Zend_Locale  $locale   OPTIONAL Locale/Language to set, identical with locale identifier,
	 *                                       see Zend_Locale for more information
	 * @param  array               $options  OPTIONAL Options to set
	 */
	public function __construct($data, $locale = null, array $options = array())
	{
		parent::__construct($data, $locale, $options);
	}


	/**
	 * Load translation data (QT file reader)
	 *
	 * @param  string  $locale    Locale/Language to add data for, identical with locale identifier,
	 *                            see Zend_Locale for more information
	 * @param  string  $filename  QT file to add, full path must be given for access
	 * @param  array   $option    OPTIONAL Options to use
	 * @throws Zend_Translation_Exception
	 * @return array
	 */
	protected function _loadTranslationData($filename, $locale, array $options = array())
	{
		$this->_data = array();
		if (!is_readable($filename)) {
			require_once 'Zend/Translate/Exception.php';
			throw new Zend_Translate_Exception('Translation file \'' . $filename . '\' is not readable.');
		}

		$this->_target = $locale;

		$encoding = $this->_findEncoding($filename);
		$this->_file = xml_parser_create($encoding);
		xml_set_object($this->_file, $this);
		xml_parser_set_option($this->_file, XML_OPTION_CASE_FOLDING, 0);
		xml_set_element_handler($this->_file, "_startElement", "_endElement");
		xml_set_character_data_handler($this->_file, "_contentElement");

		if (!xml_parse($this->_file, file_get_contents($filename))) {
			$ex = sprintf('XML error: %s at line %d',
			xml_error_string(xml_get_error_code($this->_file)),
			xml_get_current_line_number($this->_file));
			xml_parser_free($this->_file);
			require_once 'Zend/Translate/Exception.php';
			throw new Zend_Translate_Exception($ex);
		}

		return $this->_data;
	}

	private function _startElement($file, $name, $attrib)
	{
		switch(strtolower($name)) {
			case 'message':
				$this->_source = null;
				$this->_stag = false;
				$this->_ttag = false;
				$this->_scontent = null;
				$this->_tcontent = null;
				break;
			case 'source':
				$this->_stag = true;
				break;
			case 'translation':
				$this->_ttag = true;
				break;
			default:
				break;
		}
	}

	private function _endElement($file, $name)
	{
		switch (strtolower($name)) {
			case 'source':
				$this->_stag = false;
				break;

			case 'translation':
				if (!empty($this->_scontent) and !empty($this->_tcontent) or
				(isset($this->_data[$this->_target][$this->_scontent]) === false)) {
					$this->_data[$this->_target][$this->_scontent] = $this->_tcontent;
				}
				$this->_ttag = false;
				break;

			default:
				break;
		}
	}

	private function _contentElement($file, $data)
	{
		if ($this->_stag === true) {
			$this->_scontent .= $data;
		}

		if ($this->_ttag === true) {
			$this->_tcontent .= $data;
		}
	}

	private function _findEncoding($filename)
	{
		$file = file_get_contents($filename, null, null, 0, 100);
		if (strpos($file, "encoding") !== false) {
			$encoding = substr($file, strpos($file, "encoding") + 9);
			$encoding = substr($encoding, 1, strpos($encoding, $encoding[0], 1) - 1);
			return $encoding;
		}
		return 'UTF-8';
	}

	/**
	 * Returns the adapter name
	 *
	 * @return string
	 */
	public function toString()
	{
		return "Qt";
	}
}
